Elevator safety device.



D. J. SULLIVAN.

ELEVATOR SAFETY DEVICE.

APPLICATION FILED APR.21,1'911.

Patented se t. 12,1911.

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COLUMBIA PLANOl IRAPH c0., WASHINGTON. n. c.

D. J. SULLIVAN. ELEVATOR SAFETY DEVICE. APPLICATION IILED 123.21, 1911.

Patented Sept. 12, 1911.

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COLUMBIA PLANOORAPN 60.,WASHINGTON, D. c.

DENNIS J'. SULLIVAN, OF ALIQUIPPA, PENNSYLVANIA.

ELEVATOR SAFETY DEVICE.

Specification of Letters Patent.

Patented Sept. 12, 1911.

Application filed April 21, 1911. Serial No. 622,559.

To all whom it may concern:

Be it known that I, DENNIS J. SULLIVAN, a citizen of the United Statesof America,

residing at Aliquippa, in the county of' ing had therein to theaccompanying drawing.

This invention relates to elevator safety devices, and the primaryobject of my invention is to furnish an elevator cage with a safetydevice that will be automatically operated to prevent a sudden descentof the cage should the hoisting cables thereof break, thereby preventingproperty and lives from being injured.

Another object of this invention is to provide a safety elevator devicethat is applicable to various types of elevators and free from injury byordinary use.

A further object of this invention is to provide a device of the abovetype simple in construction, inexpensive to install and highly eflicientfor the purposes for which it is intended. I

With the above and other objects in view the invention resides in anovel construction, combination and arrangement of parts to behereinafter specifically described and then claimed.

Reference will now be had to the drawings wherein like numerals ofreference designate corresponding parts throughout the several views, inwhich Figure 1 is a side elevation of a portion of an elevator cageprovided with the safety device. Fig. 2 is a plan of the same. Fig. 3 isa longitudinal sectional View of the device, and Fig. 4 is a verticalcross sectional view of the same. i

The reference numerals 1 denote the guide rails of an elevator shaft,said rails being T-shape in cross section and secured to the lateralflanges 2 of said rails are a plurality of equally spaced stops orprojections 3 arranged against the webs of said rails.

4 denotes transverse channel bars constituting the beam of an elevatorcage 5 and suitably connected to the ends of the bars 4 are verticalchannel bars 6 constituting the side frames of the cage, which supportthe floor or body of the cage (not shown).

7 denotes angles secured to the confronting faces of the bars 4intermediate the ends thereof and these angles support guide blocks 8within the bars 4, said guide blocks having the confronting facesthereof cut away, as at 9 for an inverted T-shaped head 10. This headsupports eye bolts 11 to which are attached the hoisting cables 12.These eye bolts can be dispensed with and the cables suitably fastenedaccording to the type of elevator.

13 denotes apertured lugs carried by opposite sides of the head 10 andconnected to said lugs are the inner ends of cables 14, said cablespassing under revoluble sheaves mounted in depending brackets 16,carried by the beam of the elevator cage.

17 denotes bearings arranged between the upper ends of the bars 6adjacent to the bars 4, said bearings having lateral flanges 18 securedto the bars 6, as at 19. Bearings 17 are provided with outwardlyprojecting guide arms 20 adapted to engage the sides of the web of eachof the rails 1. The bearings 17 are provided with longitudinal openings21 for bifurcated members 22, said members having the outer ends thereofbifurcated to provide locking pins 28 adapted to engage the stops 3. Theinner ends of memhere 22 are connected to the outer ends of the cables14, and encircling said cables, between the members 22 and the brackets16 are coiled compression springs 24. The inner ends of the springs 24are housed in cups 25, carried by the brackets 16.

When the hoisting cables 12 break the head 10 is immediately releasedand the tension of the compression springs 24 forces the members 22outwardly, whereby the pins 23 of said members engage the stops 3.

I reserve the right to use the device at the lower end of the elevatorby continuing the hoisting cables along the sides of the cage.

While in the drawings there is illustrated a preferred embodiment of theinvention, it is to be understood that the structural elements aresusceptible to such changes as fall within the scope of the appendedclaim.

What I claim is In an elevator safety device, the combination with guiderails T-shaped in cross section and having the lateral flanges thereofprovided with equally spaced stops, of a cage movable between saidrails, said cage comprising transverse channel bars, vertical channelbars, hoisting cables for the cage, a head movably mounted between saidtransverse channel bars intermediate the ends thereof and adapted to beattached to the having the inner ends thereof connected to hoistingcables of said cage, depending said head and the Outer ends to saidmembrackets carried bysaid transverse channel bers, and coiledcompression springs encirbars, revoluble sheaves supported by said clingsaid cables between said members and 5 brackets, bearings arrangedbetween the upsaid brackets, substantially as described.

per ends of said verticalchannel bars and In testimony whereof I aflixmy signature having guide arms engaging said rails said in the presenceof two witnesses. V bearings having openings 'formed therein, DENNIS J.SULLIVAN. bifurcated members movably arranged in Witnesses: 10 theopenings of said bearings andproviding MAX H. SRoLovrrz,

pins adapted to engage-said stops, cables CHRISTINA T. H001).

7 -Copies of this patent may be obtained for five cents each, byaddressing the, Commissioner of Patents,

Washington, D. G.

